I've also tried that. However the measuring cup can't be used as a water bottle.
With the Monster bottle and the Gatorade cup, I can boil water, then pour that out into the Gatorade cup, and use my Monster to drink out of. Or I can boil in my water bottle, pour that out into a Freezer bag, then pour hot water into the Gatorade cup and have coffee with my meal.
And with the tea candle stove you have to carry fuel in a separate container. The thing about keeping your fuel in your stove is that you don't have any waste. It may only take 15ml to boil in 60deg weather with no wind and 65deg water. However it may take 25ml to boil 16oz ub 40deg weather with 50deg water. So with your fuel kept in your stove, however long it takes I just blow it out when I'm done and unused fuel remains contained. The stove holds 4oz which is more than enough for a 3nighter. It boils 2cups in about 5.5mins with using about .75oz of fuel.